Feed-mill



(No Model.)

G. D. .ROWELL. FEED MILL.

No. 402,618. Patented May 7, 1889,.

N. PETERS. rmwuzm n nar, Wilhinglnn. n.c.

UNITED STATES PATENT OFFICE.

GUILFORD D. ROWVELL, OF APPLETON, VVISCONSINI FEED-MILL.

SPECIFICATION forming part of Letters Patent No. 4=02,618, dated May 7', 1889. i A Application filed October 15, 1888. Serial No. 288,130. (No model.)

To aZZ whom it may concern.-

Be it known that I, GUILFORD D. RowELL, of Appleton, in the county of Outagamie and State of Viisconsin', have invented new and useful Improvements in Feed-Mills; and I do hereby declare the following to be a full, clear, and exact description of said invention, reference being had to the accompanying drawings, and to the letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in feed-mills, and it pertains to the peculiar construction and arrangement of the several details hereinafter referred to, and the same are explained'by reference to the accompanying drawings, in whichn Figure 1 represents a perspective view of my machine. Fig. 2 is a horizontal section drawn on line X X of Fig. 1. Fig.3 is a vertical section drawn on line Y Y. of Fig. 2. Fig. 4 is a detail showing the device for adjusting the feed-gate. Fig. 5 is a detail showing the device for adjusting the stationary grinding-b urr to conform to the surface of the rotating grinding-burr. Fig. 6 represents the stationary grinding-burr removed from the machine. Figs. 7 and 8 are details showing the manner of adjusting the j ournal-bearin gs at the respective ends of the auxiliary driving-shaft. Fig. 9 is a detail showing one end of the feeding mechanism.

Like parts are represented by the same reference-letters throughout the several views.

' The general construction and arrangement of the stationary grinding-burr A and the rotating grinding-burr B within the chamber 0, and the feed mechanism D and E, by which the feed is forced forward from the receptacle F and hopper F between the grinding-surfaces of the burrs, are constructed substan tially in the ordinary way.

H is an adjusting-screw, supported at its outer end in a loosely-fitting aperture, I, and at its inner end. in a screw-threaded frictionbearing or nut, J, which nut J is held rigidly in place by its frictional contact with the bearing-surface K upon one side and the adjusting-screw L upon its opposite side. The

friction of the bearing-surfaces upon the nut J is sufficient to hold it in place for ordinary grinding; but when the burrs meet with an obstruction which would otherwise break them the friction-bearing or nut J is forced outward, thus permitting the burrs to separate from each other. The screw H is turned toward the right and left through the nut or friction-bearing J, as may be required in adjusting the grinding-burrs for grinding coarse or fine feed.

M M are movable blocks or bearing-s11 rfaces, which are interposed between the end of the shaft G and the adjusting-screw H. The stationary grinding-burr is supported upon one side by stationary pivot N and upon the opposite side by an adjustable pivot, O, which pivot O is supported and adjusted by the three adj listing-screws P P, as shown in Fig. 1

5, whereby it is obvious that the vertical sides of the stationary burr may be adjusted to conform to thesurface of the rotating burr. The lower side of the stationary burr is provided with a downward-projecting lug, R, which is located between the adj usting-screws S S. Thus it is obvious that the horizontal surfaces of the stationary burr may be inclined in either direct-ion toward or from the rotating burr by turning the adj listing-screws S, and as said adjustment is produced said stationary burr turns upon its pivots N and 0. Thus by the two sets of adj Listing-screws P and S the stationary burr may be adjusted to conform to the surface of the rotating burr. By my improvements the feed-gate T is located at the bottom of the feed-chamber, and it extends downward past the sides of the driving-shaft C, and it is provided with guide- Ways at d, formed therefor in the respective sides of. the chamber F, and with a slot, 1, formed in its lower edge for the reception of the. shaft G. In Fig. 3 the feed-gate T is shown in its raised or open position,in which position the feed is forced beneath it.

Located beneath the shaft G is a vertical partition, 2, which is adapted to close the aperture 1, formed in the gate T, when said gate is closed, whereby the feed is prevented from passing to the grinding-burrs beneath the shaft. The gate T is provided .with an upward-proj ecting arm, 3, having a series of gear-teeth, 4, into which the teeth of the pinion 5 are adapted to mesh. rigidly affixed to the shaft 6 and turns with it. To one of the protruding ends of the shaft The pinion 5 is 6 is afiixed a hand-wheel, 7,by which the pinion 5 is turned. hen the hand-wheel 7 is turned in one direction the gate T is raised, and when turned in the opposite direction it is closed. A spiral spring, 9, is interposed between the bearings of the hand-wheel '7 and one of the shaft-supporting lugs 10, which, by its frictional contact with said hand-wheel, prevents it from being turned by the weight of the feed-gate. Thus the gate is held by the friction of said spring 9 at any point of adjustment desired. As shown in Fig. 9, the spiral feed-flanges E are formed in two parts, a a, which parts taper outwardly from the cylinder 11, to which they are attached to their ends at b 17, whereby any foreign substances of greater dimensions than that of the grain which is being ground are permitted to enterbeneath and are crushed by them as they rotate.

13 is an auxiliary shaft, by which the mill may be connected by ordinary couplings and a tumbling-rod with a horse or other power. \Vhen the mill is operated bya tumblingrod, as mentioned, motion is communicated from the shaft 13 to the driving-shaft G of the mill through the gear-wheels 14 and 15. The shaft 13 is supported at its respective ends by the end frames, 16 and 17, in the adjustable journal-bearings 18, which bearings are supported by the adjusting-screws 2O 20. The journalbearings 18 are formed alike at both ends of the shaft 13, and are fully illustrated in Figs. 7 and 8.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a feed-mill, the combination of the driving-shaft G, the thereon-supported grinding-burr B, adjusting-screw H, friction bearing-block J, and block-retaining screw L, all substantially as and for the purpose specified.

2. In a feed-mill, the combination of the feed-chamber F, provided with gate-retaining guideways D D, feed-gate T, provided at its lower end with a central recess, 1, for the reception of the driving-shaft, vertical partition 2, located below said shaft and adapted to close the lower end of said recess 1 beneath the shaft, and means, substantially as described, for adjusting said feed-gate, substantially as and for the purpose specified.

3. In a feed-mill, the combination of the feed-chamber F, provided with gate-retaining guideways d d, feed-gate '1, provided at its lower end with a central recess, 1, for the reception of the driving-shaft, vertical partition 2, located below said dri ving-shaf t and adapted to close the lower end of said recess 1 beneath the shaft, upward-projecting arm 3, provided with series of cog-teeth 4:, shaft 6, supported in journal-bearings at its respective ends from the burr-inclosing case, pinion 5, affixed to said shaft 6 and meshing in the cogs of said arm =3, hand-wl1eel7,aflixed to one of the protrading ends of said shaft 6, and spiral spring 9, interposed between said hand-wheel and one of said shaft-supporting bearings, all substantially as and for the purpose specified.

In testimony whereof I aflix my signature in presence of two Witnesses.

GUILFORD D. ROWELL.

\Vitnesses:

JoHN BOTTENSEK, D. G. RoWELL. 

